stick welding stainless pipe

By kcd616

Date 02-23-2014 21:55

yes, I do
tell me about the pipe?
sincerely,
Kent

By patriot (*)

Date 02-24-2014 13:48

I will be welding 6" sch 80 304 stainless pipe using E308-15 electrode. Any tips on joint preparation and technique for making the root pass? I've never done a open root on stainless with SMAW, usually GMAW or GTAW.

Thanks.

By Milton Gravitt (***)

Date 02-24-2014 14:17

I hope you have a lot of SS pipe to practice on and hope you the best.

M.G.

By cddolan74 (**)

Date 02-24-2014 16:36

Would be curious to the manufacture. 15 coatings have a basic flux for the good mechanicals. but the arc stability and slag release on some of these rods are pretty bad. only suggestion is concentrate washing the puddle into the side walls. The bad arc stability can cause undercut

By kcd616

Date 02-24-2014 19:26 Edited 02-25-2014 04:37

first Milt is right, good luck
second to Brad old timers in 1940's to the 1980's did it on nuclear plants........learned from them :eek:

damn I am old :eek:

1/8 root gap, 3/32 land, 30-45 degree bevel on the pipe, 1/8 rod
technique is like lohy open root
hope this helps
sincerely
Kent

By patriot (*)

Date 02-25-2014 15:52

Kent, you said it's like running E7018 on the root. Are you just dragging it in the root, twisting into the sidewall and walking up?

By kcd616

Date 03-03-2014 02:22

is this a job or test?
if a job where at?
because it takes months of work and practice to make this weld
one of toughest welds to make
hope this helps
sincerely,
Kent

By 46.00

Date 03-03-2014 03:20

I have seen this test as a requirement on a couple of contracts, always for oil refinery work. In fact when I was welding, I was qualified for this, although I think I only ever did one production weld using the process. It is not an easy test to make and as far as I can remember, I used the same set up ,root face, gap etc. as I would with a carbon steel stick root. Maybe as a beginner us a slightly bigger root gap?

By WeldinFool (**)

Date 02-24-2014 19:14

I have almost thirty years experience as an industrial pipe-welder and have never, ever seen a requirement for stainless steel pipe to have the root pass welded with SMAW, is this just some sort of weird experiment or something?

By patriot (*)

Date 02-24-2014 22:39

It's field welding in a refinery where GMAW and GTAW are not used.

By WeldinFool (**)

Date 02-25-2014 19:18

I welded pipe in oil refineries for over 10 years, used GTAW for every stainless root, used it on all chrome piping too.

By 522029

Date 02-25-2014 01:18

Your boss was not like mine. We (I) did this very thing. About 6 (six) years ago.
THE boss was in charge, not me.

Griff

By patriot (*)

Date 02-25-2014 15:14

Can those of you who have experience with this please give me a little more explanation as to your technique for the root pass? And also your preferred prep for root gap and face?
Thanks!

By JTMcC

Date 02-25-2014 22:36

There's ss pipe and there's ss pipe.

Without any info, nobody can help you out. It's not the norm to run beads on pipe with stick but it's done quite a bit.
I've seen slick ss beads run downhill just like a pipeline bead (no, not in a nuke) that are sound and shoot. But your environment will determine what you can and cannot do.
After the bead is in ss is kind of runny/goofy to a CS welder. But a puddle is a puddle and control is control.
Lot's of difference in different applications. Stick in and out is good to go in a lot of app's, not acceptable in others.

So, what's your application of stick ss stick bead??

J

By patriot (*)

Date 02-26-2014 02:50

The welds are on 6" sch 80, 304 SS pipe. Welds will be made uphill using E308-15 electrode. What technique for making the open root pass uphill? And what joint prep...root gap and root face?

By Lawrence (*****)

Date 02-26-2014 16:50

http://www.kskct.cz/images/materialy/en/avesta.pdf

This has data that I've depended on for years. Including edge prep.